For the diamond blanket I went through all my wool hiding places and found cotton yarn from which I once crocheted coasters. Since you can never have enough of coasters, I started to crochet even some more before I knit in the remains in my blanket. The yarn is somewhat annoying challenging to crochet because the wool is very stringy and the crochet hook likes to come between the thread. But otherwise the Record 210 yarn from schoeller+stahl is super soft and durable with nice colors.